noun
impregnable castle; impregnable fortress
Figurative or literal: a castle so strong it cannot be taken. Often used metaphorically for an unassailable position or stronghold.
この要塞はまさに金城だ。
This fortress is truly an impregnable castle.
彼の守備は金城のようだ。
His defense is like an impregnable fortress.
noun
Historical term for the innermost fortified area of a Japanese castle, the last defensive stronghold.
金城は城の最も堅固な部分だ。
The inner citadel is the most fortified part of the castle.
noun
Golden Castle; Nagoya Castle
Nickname for Nagoya Castle, referring to its golden shachihoko ornaments. Used in tourism and historical contexts.
金城は名古屋のシンボルです。
The Golden Castle is a symbol of Nagoya.